ScienceDaily: Latest Science News

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• New horned dinosaur: Two-ton plant-eater lived 78 million years ago in Montana
• New source of stem cells form heart muscle cells, repair damage
• Genetically modified rats produced using novel sperm stem-cell technique
• Understanding the relationship between bacteria and obesity
• Clocks in the Americas and the Caribbean Islands now ticking in unison
• Consumers: Why do you like what I like, but I don't like what you like?
• Coastal birds carry toxic ocean metals inland
• Those with allergic asthma face double trouble during flu season, findings suggest
• New explaination of how certain cancers develop
• How RNA viruses copy themselves: Hijack cellular enzyme to create viral replication factories on cell membranes
• Underwater robot sent to study Deepwater Horizon spill
• Buyer beware: Consumers in conflict may become victims to unwanted influence
• New species of invertebrates discovered in the Antarctic
• Antiretroviral therapy associated with decreased risk of HIV transmission
• The great pond experiment: Pond communities bear a lasting imprint of random events in their past
• When helper cells aren't helpful
• Precise trace gas analysis, without the noise
• Tobacco industry influence on health policy detailed

New horned dinosaur: Two-ton plant-eater lived 78 million years ago in Montana Posted: 30 May 2010 02:00 PM PDT A new horned dinosaur, Medusaceratops lokii, has been discovered. Approximately 20 feet long and weighing more than 2 tons, the newly identified plant-eating dinosaur lived nearly 78 million years ago during the Late Cretaceous period in what is now Montana. Its identification marks the discovery of a new genus of horned dinosaur.

New source of stem cells form heart muscle cells, repair damage Posted: 30 May 2010 02:00 PM PDT A new and noncontroversial source of stem cells can form heart muscle cells and help repair heart damage, according to results of preliminary lab tests.

Genetically modified rats produced using novel sperm stem-cell technique Posted: 30 May 2010 02:00 PM PDT For two decades, the laboratory mouse has been the workhorse of biomedical studies and the only mammal whose genes scientists could effectively and reliably manipulate to study human diseases and conditions.

Understanding the relationship between bacteria and obesity Posted: 30 May 2010 02:00 PM PDT Research sheds new light on the role bacteria in the digestive tract may play in obesity. The studies paint a picture that may be more complex than originally thought.

Clocks in the Americas and the Caribbean Islands now ticking in unison Posted: 30 May 2010 02:00 PM PDT Clocks in the Americas and the Caribbean Islands are now ticking in unison thanks to the work of the Sistema Interamericano de Metrologia (SIM), a regional metrology organization that works to promote accurate measurements throughout the Americas.

Consumers: Why do you like what I like, but I don't like what you like? Posted: 30 May 2010 02:00 PM PDT When we like a product, do we think others will like it, too? And when we believe others like a product, do we like it as well? A new study says these two questions are fundamentally different.

Coastal birds carry toxic ocean metals inland Posted: 30 May 2010 08:00 AM PDT Biologists has found that potent metals like mercury and lead, ingested by Arctic seabirds feeding in the ocean, end up in the sediment of polar ponds.

Those with allergic asthma face double trouble during flu season, findings suggest Posted: 30 May 2010 08:00 AM PDT New research suggests that allergic reactions to pet dander, dust mites and mold may prevent people with allergic asthma from generating a healthy immune response to respiratory viruses such as influenza.

New explaination of how certain cancers develop Posted: 30 May 2010 08:00 AM PDT Researchers have discovered a new interaction between a cell signaling system and a specific gene that may be the cause of B-cell lymphoma. The finding suggests a similar interaction could be occurring during the development of other types of cancer, leading to further understanding of how cancer works -- and how it might be stopped.

How RNA viruses copy themselves: Hijack cellular enzyme to create viral replication factories on cell membranes Posted: 30 May 2010 08:00 AM PDT Researchers have made a significant new discovery about RNA (ribonucleic acid) viruses and how they replicate themselves. Certain RNA viruses -- poliovirus, hepatitis C virus and coxsackievirus -- and possibly many other families of viruses copy themselves by seizing an enzyme from their host cell to create replication factories enriched in a specific lipid. The scientists have uncovered that certain RNA viruses take control of a cellular enzyme to design a replication compartment on the cell's membrane filled with PI4P lipids. Those lipids, in turn, allow the RNA viruses to attract and stimulate the enzymes they need for replication.

Underwater robot sent to study Deepwater Horizon spill Posted: 30 May 2010 08:00 AM PDT A high-tech robotic submersible has been sent to the oily waters of the Gulf of Mexico. The goal is to collect information about the oil plume from the Deepwater Horizon drilling rig accident for the National Oceanic and Atmospheric Administration.

Buyer beware: Consumers in conflict may become victims to unwanted influence Posted: 30 May 2010 08:00 AM PDT When products don't easily fit into our goals, we experience conflict. According to a new study, conflicted consumers are easily swayed by unwanted influences.

New species of invertebrates discovered in the Antarctic Posted: 30 May 2010 02:00 AM PDT On board the German oceanographic ship and through various expeditions carried out between 1996 and 2008, two scientists have discovered six new gorgonia (colonial marine invertebrates made up of tubular bodied polyps with eight tentacles) in the Antarctic region, in the Eastern Weddell Sea. These discoveries reveal the great diversity of the Antarctic that is still unknown.

Antiretroviral therapy associated with decreased risk of HIV transmission Posted: 30 May 2010 02:00 AM PDT Researchers have found that treating HIV-infected persons with antiretroviral therapy reduces HIV transmission to their sexual partners by more than 90 percent.

The great pond experiment: Pond communities bear a lasting imprint of random events in their past Posted: 30 May 2010 02:00 AM PDT A seven-year experiment shows that pond communities bear the imprint of random events in their past, such as the order in which species were introduced into the ponds. This finding locates one of the wellsprings of biodiversity but also suggests that it may not be possible to restore ecosystems whose history we cannot recreate.

When helper cells aren't helpful Posted: 30 May 2010 02:00 AM PDT Current research suggests that T helper-type 1 cells, previously thought to mediate autoimmunity, may actual inhibit the development of experimental immune encephalomyelitis, a mouse model of multiple sclerosis, by suppressing Th17 cells.

Precise trace gas analysis, without the noise Posted: 30 May 2010 02:00 AM PDT Analyzing trace atmospheric gases can now be considerably more precise with the help of a device that delivers stable and reliable power to the lasers used in gas sensors.

Tobacco industry influence on health policy detailed Posted: 30 May 2010 02:00 AM PDT The wide reach of the tobacco industry and its influence on young people, military veterans and national health-care reform has been detailed in three new studies.

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